Environmental Engineering Reference
In-Depth Information
proportion in, for example, creosote is in the range of 3-15%. Some of these con-
taminants show a relatively high water solubility and therefore they are more mobile
than PAHs, hence they may represent up to 40% of creosote-born contaminants in
the dissolved fraction. Up to now they are seldom analyzed at contaminated sites,
but monitoring campaigns have proven their significance.
The number of contaminants belonging to this group is very high. Therefore
it is almost impossible to analyze each single contaminant. Hence, based on
their occurrence at contaminated sites (preferentially plumes) and their properties
(physico-chemical, biodegradability under in-situ conditions, (eco)toxicity) a list of
20 priority substances was derived for future monitoring (Blotevogel et al.
2008
)
(see Table
22.3
). Still our knowledge of the fate of NSO-HET in the subsurface is
scarce.
Table 22.3
Priority list of NSO-HET contaminants
No. substance [CAS-Nr.]
No. substance [CAS-Nr.]
N-HET
O-HET
1
Acridinon
[578-95-0]
12 Benzofuran
[271-89-6]
2
Carbazol
[86-74-8]
13 Dibenzofuran
[132-64-9]
3
Chinolin
[91-22-5]
14 Methylbenzofurane (2-Methylbenzofuran)
[4265-25-2]
4
Chinolinone
(Chinolin-2-on)
[59-31-49]
15 Methyldibenzofurane
(1-, 2-, 4-Methyldibenzofuran)
[60826-62-2]
5
Dimethylchinoline
(2,4-Dimethylchinolin)
[1198-37-4]
16 Dimethylbenzofurane
(2,3-Dimethylbenzofuran)
[3782-00-1]
6
Isochinolin
[119-65-3]
17 Xanthenon
[90-47-1]
7
Isochinolinone
(Isochinolin-1-on) [491-30-5]
S-HET
8 Methylisochinoline
(1-Methylisochinolin)
[1721-93-3]
18 Benzothiophen
[95-15-8]
9 Methylchinolinone
(4-Methylchinolin-2-on)
[607-66-9]
19 Methylbenzothiophene
(3-Methylbenzothiophen)
[1455-18-1]
20 Hydroxybiphenyl
∗
(2-Hydroxybiphenyl)
[90-43-7]
10 Methylchinoline
(2-Methylchinolin)
[91-63-4]
11
Phenanthridinon
[1015-89-0]
Blotevogel et al. (
2008
), Werner et al. (
2008a
)
∗
degradation product of dibenzothiophene
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